(NaturalNews) Because I take a large number of nutritional supplements, I've become increasingly concerned over the years about supplement excipients, binders and fillers. One ingredient frequently used in vitamin manufacturing is titanium dioxide, a nanoparticle powder made of fine titanium bits. It's best known as an ingredient in sunscreen, but it's also used in thousands of cosmetic products as well as nutritional products.

Yep, if you take certain vitamins made by GNC or Centrum (as well as hundreds of other companies), you are eating titanium dioxide. And this is an ingredient for which no long-term safety testing on humans has ever been conducted. In fact, according to the Canadian Center for Occupational Health and Safety, titanium dioxide may be a human carcinogen. As explained on the CCOHS website: (http://www.ccohs.ca/headlines/text186.html)

Titanium dioxide has recently been classified by the International Agency for Research on Cancer (IARC) as an IARC Group 2B carcinogen ''possibly carcinogen to humans''... This evidence showed that high concentrations of pigment-grade (powdered) and ultrafine titanium dioxide dust caused respiratory tract cancer in rats exposed by inhalation and intratracheal instillation*.

Titanium Dioxide in Supplements

Centrum vitamins are the No. 1 selling brand of vitamins in the U.S. It is made with synthetic vitamins. The ingredients label reads like a mish-mash of synthetic chemicals and low-cost ingredients with marginal absorption capability: (I'm bolding some of the more concerning ingredients below...)

Did you notice the artificial coloring chemicals, hydrogenated palm oil and the low-grade form of vitamin B12? Did you see that these vitamins contain talc and sodium benzoate? Check out this wiki page on Crospovidone, which is also found in the Centrum formula: http://en.wikipedia.org/wiki/Polyvinylpyrrol...

Vitacost bans titanium dioxide from in-house brands

Titanium dioxide is considered extremely unsafe by Vitacost, which banned the ingredient from its in-house supplements label (NSI). Soon, products from Vitacost (www.Vitacost.com) may even be labeled with a "titanium dioxide free" claim to better educate consumers.

Most of the current debate about titanium dioxide concerns its topical use and deals with the particle size of the titanium. Coarse particles are believed to be relatively safe for topical use because they cannot be absorbed by the skin. But nano particles may pose a greater risk because there is concern they can be readily absorbed through the skin and enter the bloodstream. As explained by the Environmental Working Group, "Relative to larger particles, nano-scale materials can be more chemically reactive and more easily absorbed into the body. A number of studies raise concerns about potential health risks when these particles are inhaled or are absorbed through the skin or gut. Nevertheless, they are already widely used in products, including sunscreens, with no requirement that their presence be disclosed."

That same page, however, (http://www.ewg.org/cosmetics/report/sunscree...) admits there are few studies that have really looked at the titanium dioxide nano particle absorption issue in regards to cosmetics. EWG concludes titanium dioxide is unlikely to be absorbed by the skin, but it calls for more studies to be sure.

There are even fewer studies that look at whether titanium dioxide is safe for human ingestion, and that's potentially a far more serious issue. Although vitamin manufacturers will of course claim "there's no evidence of harm" from titanium dioxide in nutritional supplements, the reason there's no evidence is because they haven't done any long-term safety tests on titanium dioxide.

The "common sense test" asks the question: Does titanium dioxide occur naturally in the indigenous human food supply? The answer to that is, of course, absolutely not. That's why holistic nutritionists and nutritionally-aware consumers are increasingly seeking to avoid this ingredient in anything they eat or swallow. If it's not part of the food supply in nature, and if it hasn't been proven safe for human consumption, why would you want to introduce an unnatural chemical into your diet in the first place?

The jury is still out on titanium dioxide, but until it's proven safe, NaturalNews recommends readers avoid this ingredient and only purchase nutritional supplements made without it. Fortunately, there are a great many supplement brands available today without titanium dioxide (and other bizarre excipients). Just read the ingredients labels before you buy.

About the author:Mike Adams (aka the "Health Ranger") is a best selling author (#1 best selling science book on Amazon.com) and a globally recognized scientific researcher in clean foods. He serves as the founding editor of NaturalNews.com and the lab science director of an internationally accredited (ISO 17025) analytical laboratory known as CWC Labs. There, he was awarded a Certificate of Excellence for achieving extremely high accuracy in the analysis of toxic elements in unknown water samples using ICP-MS instrumentation. Adams is also highly proficient in running liquid chromatography, ion chromatography and mass spectrometry time-of-flight analytical instrumentation.

Adams is a person of color whose ancestors include Africans and Native American Indians. He's also of Native American heritage, which he credits as inspiring his "Health Ranger" passion for protecting life and nature against the destruction caused by chemicals, heavy metals and other forms of pollution.

Adams is the founder and publisher of the open source science journal Natural Science Journal, the author of numerous peer-reviewed science papers published by the journal, and the author of the world's first book that published ICP-MS heavy metals analysis results for foods, dietary supplements, pet food, spices and fast food. The book is entitled Food Forensics and is published by BenBella Books.

In addition to his lab work, Adams is also the (non-paid) executive director of the non-profit Consumer Wellness Center (CWC), an organization that redirects 100% of its donations receipts to grant programs that teach children and women how to grow their own food or vastly improve their nutrition. Through the non-profit CWC, Adams also launched Nutrition Rescue, a program that donates essential vitamins to people in need. Click here to see some of the CWC success stories.

With a background in science and software technology, Adams is the original founder of the email newsletter technology company known as Arial Software. Using his technical experience combined with his love for natural health, Adams developed and deployed the content management system currently driving NaturalNews.com. He also engineered the high-level statistical algorithms that power SCIENCE.naturalnews.com, a massive research resource featuring over 10 million scientific studies.

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